Test powdet question

Bout to place my IC order.. Just curious- would using test powder
A) with erase be a bad idea due to the AI property ingredients already found in TP
B) would using test powder in between cycles of erase be a bad idea, again, due to the AI property ingredients

Example of scenario B
4 weeks erase
4 weeks TP
4 weeks erase

A quick reply would be greatly appreciated so I can click submit order